JPH10541A - Internal processing unit for pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate the internal processing of a bent pipe adaptationally by bearing a rotary shaft in the adjacent to a surface treatment tool and providing an internal pipe moving guide for moving the surface treatment tool in the longitudinal direction along the central line of a pipe and a drive device for the surface treatment tool. SOLUTION: A surface treatment tool 10 rotates so as to scrubbingly treat the inside 12a of a pipe 12. An internal pipe moving guide 20 is positioned in the adjacent to the surface treatment tool 10, bears a rotary shaft 14 of the surface treatment tool 10, is brought in contact with the internal face 12a at a plurality of points, and guides the axis of the rotary shaft 14 along the central line of the pipe in such a state that the surface treatment tool 10 moves in the longitudinal direction of the pipe 12. This internal pipe moving guide 20 and the surface treatment tool 10 constitute a head part 11. A drive motor 30 is interconnected with the rotary shaft 14 of the surface treatment tool 10 and rotationally drive the surface treatment tool 10. Providing of this head part 11 enables burr removal grinding suited to pipes bent steeply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating the inner surface of a pipe. Examples of the tube inner surface treatment device include a device for grinding the inner peripheral wall surface (the inner surface of the tube) of a tubular casting, an inner peripheral polishing device for polishing (honing) the inner surface of the tube, and a cleaning device for cleaning the inner surface of the tube. is there.

[0002]

2. Description of the Related Art Conventionally, in deburring in a casting finishing process, mechanical processing has been widely used for burrs and parting burrs on the outside of a work. For example, a robot that moves a grinding head three-dimensionally is used. By such automation, a workpiece having a complicated outer shape can be efficiently ground, and labor costs can be reduced and manufacturing costs can be reduced. On the other hand, most of the inner surface treatment of the pipe, such as grinding of the inner surface of the pipe, is performed manually except for a simple straight pipe grinding step. In the case of grinding by hand, even if the pipe is a cast iron deformed pipe or the like, it is possible to treat the inner surface of the pipe with the skill of an operator.

[0003]

However, even in the case of a cast iron deformed pipe having a simple shape in which the pipe is only slightly bent, it is difficult to suitably move the grinding tool in the pipe along the bend. Conventionally, automation has not been performed. The work of manually grinding the inner surface of the pipe is inefficient, cannot reduce the manufacturing cost, and has a problem that it is difficult to perform uniform inner surface treatment such as grinding on a large number of works.

Accordingly, an object of the present invention is to provide a pipe inner surface treatment apparatus capable of suitably automating the inner surface treatment of a bent pipe such as deburring grinding of an inner surface of a cast iron deformed pipe.

[0005]

The present invention has the following configuration to achieve the above object. That is, the present invention provides an inner surface treatment apparatus for a pipe in which a rotating surface treatment tool is brought into contact with an inner surface of a pipe and rubs the inner surface of the pipe. While supporting and supporting the shaft, the shaft comes into contact with the inner surface of the tube at a plurality of points, and the processing tool is guided in such a manner that the processing tool moves in the longitudinal direction of the tube while the axis of the rotating shaft is along the center line of the tube. And a drive device connected to the rotation axis of the surface treatment tool and configured to rotationally drive the surface treatment tool.

Further, the driving device has an output shaft that is driven to rotate, and a rotation shaft of the surface treatment tool is connected to the output shaft via a transmission shaft. The output shaft is connected to the transmission shaft, and the rotation shaft is connected to the output shaft. By being connected to the transmission shafts by universal joints, the inner surface of a long and bent pipe can be suitably treated.

Further, the driving device moves along a reciprocating guide for reciprocatingly moving the surface treatment tool connected to the driving device along a center line of the pipeline. , Can be suitably automated.

[0008] Further, the drive device is provided so as to be able to change and adjust the angle relative to a pipe as a work,
The inner surface of a tube having a relatively large bend angle can be suitably treated.

The surface treatment tool has a main body unit integrated with the rotating shaft, and is rotatably mounted at one end at at least three places on the main body unit, and the other end is externally rotated by centrifugal force. The processing piece formed as a part pressed against the inner surface of the tube when rubbed toward the inner surface and rubbing the inner surface, and the other end of the processing piece is not pressed against the inner surface of the tube when no centrifugal force acts. With the urging means for urging inward as described above, the surface treatment tool can be suitably inserted into the pipe, and the inner surface of the pipe can be suitably processed.

The processing piece is rotatably mounted on a pin provided on a main body of the surface processing tool and parallel to the rotation axis, and a through hole of the processing piece into which the pin is inserted. The surface treatment tool can be tilted following the bending of the pipe because the hole diameter at both ends is larger than that at the center so that the processing piece can be tilted slightly.

The in-pipe moving guide is arranged at least at three places in the circumferential direction, and rotates while contacting the inner surface of the pipe so as to move the surface treatment tool and the in-pipe moving guide in the longitudinal direction of the pipe. Having at least two sets of rollers each including a plurality of rollers in the longitudinal direction of the pipe and being provided adjacent to the rear side that is the drive unit, the surface treatment tool can be suitably moved in the pipe. The inner surface of the tube can be suitably treated.

[0012] The in-pipe moving guide is provided at least at three places in the circumferential direction, and includes a plurality of rollers that rotate so as to move the surface treatment tool and the in-pipe moving guide in the longitudinal direction of the pipe. The group is disposed so as to be adjacent to the front and rear with the surface treatment tool interposed therebetween, so that the surface treatment tool can be supported in a balanced manner from the front and back and the movement in the pipe can be guided, so that the inner surface of the pipe It can be suitably processed.

A roller mounting portion to which the roller is rotatably mounted is provided movably in a predetermined range in a radial direction of the pipe and is received by an urging member.
Since the roller is provided so as to be able to move in the radial direction following the unevenness of the inner surface of the tube, the surface treatment tool can be suitably moved in the tube, and the inner surface of the tube can be suitably polished.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing an embodiment of a tube inner surface processing apparatus according to the present invention, and shows a state in which a head portion 11 is inserted into a curved tube. Reference numeral 10 denotes a surface treatment tool which rotates and
This is a grinding tool that abuts against the inner surface 12a of the tube and rubs the inner surface 12a of the tube. This surface treatment tool 10 is, for example,
When inserted into the tube 12 without rotating, the overall diameter becomes smaller than the inner diameter of the tube, and when rotating and polishing the inner surface 12a of the tube, the overall diameter increases due to centrifugal force. Any mechanism may be used so that (the processing piece or the like) can contact the inner surface 12a of the tube.

Reference numeral 20 denotes an in-pipe movement guide, which is adjacent to the surface treatment tool 10, supports and supports a rotation shaft 14 of the surface treatment tool, and abuts on the inner surface 12a of the pipe at a plurality of points. The surface treatment tool 10 is guided to move so that the surface treatment tool 10 moves in the longitudinal direction of the pipe 12 with the axis of the line along the center line of the pipe line. Inner surface 12 of tube
The portion 20a that comes into contact with a may be a point on the outer peripheral surface of the roller 22, for example, as shown in the drawing. Also,
The points at which the in-pipe movement guide 20 abuts on the inner surface of the pipe are provided at least at three places in the circumferential direction, and are arranged in at least two rows in the movement direction of the in-pipe movement guide 20, so that the in-pipe movement guide 20 Can be suitably positioned with respect to the center line of the pipeline, and can be suitably moved in the pipeline (circular cross section). The head unit 11 is constituted by the in-pipe movement guide 20 and the surface treatment tool 10. The “along state” in which the axis of the rotating shaft 14 is along the center line of the pipeline means that the axis and the center line are parallel or the axis is tangent to the center line on the curve. The axis is not limited to the above, and the axis may be inclined or separated from the center line within a range in which the intra-pipe movement guide 20 can appropriately move in the pipe in accordance with the pipe path. Of course, it means that they are along.

Reference numeral 30 denotes a drive motor, which is a surface treatment tool 1
This is a driving device that is connected to the 0 rotation shaft 14 and rotationally drives the surface treatment tool 10. The drive motor 30 includes an output shaft 30a that is driven to rotate. The rotation shaft 14 of the surface treatment tool 10 is connected to the output shaft 30a via a transmission shaft 32. The output shaft 30a is connected to one end of the transmission shaft 32 by a first universal joint 34 which is a universal joint. Further, the rotating shaft 14 is connected to the other end of the transmission shaft 32 by a second universal joint 36 which is a universal joint. Since the transmission mechanism for transmitting the rotational power of the drive motor 30 is formed as described above, the surface treatment tool 10 can be rotatably inserted into the long and bent inner surface of the pipe 12, and the inner surface of the pipe can be suitably inserted. 12a can be suitably processed.

Reference numeral 40 denotes a reciprocating guide, and the mounting table 4 on which the drive motor 30 is mounted along the reciprocating guide 40.
2 can move. Thereby, the surface treatment tool 10 linked to the drive motor 30 via the transmission shaft 32 can be suitably moved in the pipe 12 in the longitudinal direction. That is, the surface treatment tool 10 can be suitably fed along the center line of the pipeline by the action of the reciprocating guide 40 and the in-pipe movement guide 20. This makes it possible to suitably cope with automation.

Reference numeral 50 denotes a guide tube, which is a sheath-shaped storage portion that is stored when the head portion 11 is not inserted into the tube 12. Further, the head portion 11 is guided by the guide tube 50, and is suitably introduced into the tube 12, which is a work. Further, the drive motor 30 may be provided so as to be able to change and adjust the angle relative to the pipe 12 as a work by an angle adjusting mechanism (not shown). According to this, the transmission shaft 32
Can be preferably prevented from interfering with the inner surface of the tube 12, and the inner surface of the tube having a larger bend angle can be suitably treated.

[0019]

Next, an embodiment of the head section 11 will be described with reference to FIG.
This will be described with reference to FIG. Note that the head 11
Is used when grinding the inner surface 12a of the cast iron deformed pipe. (First Embodiment) FIG. 2 is a side view of a first embodiment of the head section 11. FIG. FIG. 3 shows a surface treatment tool 10 according to the first embodiment.
FIG. 4 is a front view of the pipe moving guide 2 of the first embodiment.
0 shows a front view. First, the surface treatment tool 1 of the first embodiment
0 will be described. Reference numeral 15 denotes a main body, and a key 15a
Are integrated with the rotating shaft 14. Numeral 16 denotes a processing piece, which is rotatably mounted on the main body 15 (in this embodiment, at three equally-spaced positions) at one end 16a. Also, when the other end 16b is turned outward by centrifugal force, it is pressed against the inner surface 12a of the tube and
Is formed as a portion to be rubbed. That is, the main body 1
5 functions as a tool holder of the grinding tool, and the processing piece 16 functions as a tool piece of the grinding tool. When the inner surface of a very large tube is polished, only one processing piece may be used to reduce the weight of the head portion, and the number of processing pieces is not limited.

Reference numeral 18 denotes a coil spring,
a engages with the other end 16b of the processing piece, the other end 18b engages with the main body 15, and is loaded between the other end 16b and the main body 15. Therefore, this coil spring 18
Functions as urging means for urging the other end 16b of the processing piece inward so as not to press against the inner surface 12a of the tube when no centrifugal force is applied. The coil spring 18 causes the other end portion 16b of the processing piece to abut against the inner surface 12a of the tube due to centrifugal force only when the surface treatment tool 10 rotates. In addition, when rotated, a process (grinding) of rubbing the inner surface 12 of the tube can be suitably performed.

The processing piece 16 is attached to a pin 19 provided on the main body 15 in parallel with the rotation shaft 14 by one end 16a.
Is rotatably mounted on a shaft, and the other end 16b can be rotated by centrifugal force. The through-holes 17 of the processing piece 16 into which the pins 19 are inserted are formed such that the diameters of the ends 17b and 17b are larger than those of the central portion 17a so that the processing piece 16 can slightly tilt. Thereby, if the surface treatment tool 10 follows the bending of the pipe 12 or the like and is within a predetermined minute angle range, it can be suitably inclined. Therefore, the surface treatment tool 10 on which the plurality of treatment pieces 16 are rotatably mounted can be suitably moved inside the tube 12.

The portion of the treated piece 16 that rubs the inner surface 12a of the tube is, for example, a grinding abrasive surface 16c formed by electrodepositing abrasive grains, so that the inner surface of the cast iron deformed tube can be suitably ground. be able to. The abrasive grains include diamond particles, borazon particles and the like. In addition, it is needless to say that the grinding grain surface 16c may be a grindstone surface of a grindstone provided in a segment shape. The other end 16b of the processing piece 16 having the abrasive grain surface 16c is provided so as to be easily replaced with a screw. In the grinding device, since the abrasive grain surface 16c is consumed, this part can be easily replaced, so that maintenance management can be easily performed.

Next, the in-pipe movement guide 20 of the first embodiment will be described. As shown in FIG. 4, the in-pipe movement guides 20 are arranged at six locations in the circumferential direction, and come into contact with the inner surface 12 a of the pipe so as to move the surface treatment tool 10 and the in-pipe movement guide 20 in the longitudinal direction of the pipe 12. Multiple rotating rollers 2
There are two sets (see FIG. 2) of roller groups consisting of 2, 22,... In the longitudinal direction of the tube 12. Further, these rollers are provided with a drive motor 3 for the surface treatment tool 10.
It is provided adjacent to the 0 side (rear side). Thereby, the surface treatment tool 10 can be suitably moved within the pipe 12 to the tip thereof, and the entire inner surface of the pipe 12 can be suitably ground.

The rollers 22 are not arranged in the circumferential direction (six places) as in the present embodiment, but may be arranged in at least three places in the circumferential direction.
Can preferably move along the center line of a pipe having a circular cross section.
Further, even if three or more sets of the rollers are provided in the longitudinal direction of the pipe, the intra-pipe movement guide 20 can preferably move in the pipe 12. Furthermore, not only the roller 22 but also a roller that can suitably slide on the inner surface 12a of the tube may be employed. For example, the same effect can be obtained by providing a plurality of ski-shaped sliding members in the circumferential direction in such a manner that the longitudinal direction of the sliding member is replaced with the roller 22 and the longitudinal direction of the sliding member is the same as the moving direction.

Further, the rollers 22, 22 of the first embodiment,
Are rotatably mounted via a shaft 23 before and after a plurality of roller mounting portions 24 provided at predetermined intervals in the circumferential direction. The roller mounting portion 24 is provided so as to be movable in a predetermined minute range in the radial direction of the tube 12 and is received by a spring 26 as an urging member. Specifically, the roller mounting portion 24 is engaged with the fixing bolt 27 so as to be movable in the radial direction of the in-pipe movement guide 20 within a predetermined minute range. And Sarah spring 26,
It is elastically mounted between a roller main body 28 and a bearing body 28 that receives the rotating shaft 14 via a bearing 29. This causes the rollers 22, 22 to move the inner surface 12 of the tube.
It is possible to move in a predetermined minute range in the radial direction following the unevenness of a. Therefore, even if there is some obstacle in the inner surface 12a of the pipe, the in-pipe movement guide 20 can appropriately pass through the inside of the pipe 12, and the surface treatment tool 10 supported by the in-pipe movement guide 20 can be moved inside the pipe 12. By suitably moving, the inner surface 12a of the tube can be suitably ground.

According to the grinding apparatus provided with the head portion 11 described above, deburring grinding (grinding for making projecting burrs flush with the surrounding casting surface) in a pipe which is formed to be greatly bent is performed. It can be suitably performed. By performing the grinding process on the inner surface of the pipe in this way, it is possible to remove the surface defects and to make the casting surface roughness uniform, thereby obtaining the inner surface of the pipe in which powder coating or the like can be suitably performed.

Further, in the grinding apparatus having the above-described configuration, the grinding of the inner surface 12a of the tube may be performed in the return process of the head portion 11. That is, first, the head 11 is inserted to the tip side of the tube 12 without rotating, and when the head 11 is pulled back to the drive motor 30 side, the head 11 is rotated to grind the inner surface 12a of the tube. According to this, it is possible to prevent the chips from adversely affecting the in-pipe movement guide 20 to a minimum. Further, if the head portion 11 is first sent to the distal end side of the tube 12, there is an advantage that it can be confirmed that the head portion 11 can be suitably moved in the tube 12. However,
Conversely, it is also possible to perform the grinding with the insertion of the head 11 into the tube 12, that is, the grinding while pushing the head 11.

(Second Embodiment) Next, a second embodiment of the head section will be described with reference to FIG. In-pipe movement guide 2
0a is a roller group consisting of a plurality of rollers 22, 22, ..., which are arranged at four locations in the circumferential direction and rotate so as to move the surface treatment tool 10 and the in-pipe movement guide 20a in the longitudinal direction of the pipe 12. It is provided so as to be adjacent to the front and rear with the surface treatment tool 10 interposed therebetween. According to the in-pipe movement guide 20a, since the surface treatment tool 10 can be supported in a well-balanced manner from the front and back to guide the movement in the pipe 12,
The inner surface 12a of the tube can be suitably ground. More specifically, the surface treatment tool 10 is formed in the same manner as in the first embodiment, and the configuration of the in-pipe movement guide 20a is basically the same as that in the first embodiment, but the cushion mechanism of the roller 22 is different. .
The details of the in-pipe movement guide 20a will be described. The roller mounting portion 52 to which the roller 22 is rotatably mounted is
A guide bolt (not shown) fixed to the bearing body 51 is movably engaged in a predetermined minute range in the radial direction of the in-pipe movement guide 20a.
The shaft 4 is rotatably mounted on the shaft 4 so that the moving direction is regulated and the moving range is minutely regulated. Further, as in the first embodiment, a spring is provided between the bearing body 51 and the roller mounting portion 52. As a result, the roller 22 can move in a predetermined minute range in the radial direction following the irregularities of the inner surface 12a of the tube, and substantially the same effect as in the first embodiment can be obtained.

Next, another embodiment will be described with reference to FIG. As is clear from the figure, the surface treatment tool 10
, A head portion 11 composed of a pipe moving guide 20, two pipe moving guides 20, transmission shafts 32 a, 32 a arranged between the pipe moving guides 20 and transmitting power, and each transmission shaft 3.
2a and universal joints 36a, 36a,. in this way,
By providing a plurality of in-pipe movement guides 20, the surface-treating tool 10 which is rotationally driven into the largely bent pipe 12 is provided.
Can be suitably inserted, and the inner surface 12a of the tube can be suitably ground.

By the way, in the above embodiment, the system for exclusively moving the surface treatment tool while fixing the work has been described. However, the present invention is not limited to this. Of course, the positional relationship with the grinding tool, which is a surface treatment tool, may be relatively moved. Further, the system of the above embodiment includes a grinding feed driving device for suitably feeding a grinding tool (surface treatment tool 10), a speed control device for controlling the feeding speed, and a control so that the grinding feeding driving device is not overloaded. Of course, it is possible to provide a device such as an overload control device for cooling, a tool cooling device for cooling the tool, and a device for removing chips. As described above, the present invention has been described variously with reference to preferred embodiments. However, the present invention is not limited to the embodiments, and it is needless to say that many modifications can be made without departing from the spirit of the invention. That is.

[0031]

According to the present invention, the in-pipe movement guide is adjacent to the surface treatment tool, bearings and supports the rotating shaft of the surface treatment tool, and abuts the inner surface of the pipe at a plurality of points. The surface treatment tool can be guided to move in the longitudinal direction of the pipe while the axis of the rotation axis is along the center line of the pipe. Therefore, the inner surface treatment of the bent pipe, such as the deburring grinding of the inner surface of the cast iron deformed pipe, can be suitably automated and performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a tube inner surface treatment apparatus according to the present invention.

FIG. 2 is a side view illustrating a first embodiment of a head unit.

FIG. 3 is a front view of the surface treatment tool of the first embodiment of FIG. 2;

FIG. 4 is a front view of the in-pipe movement guide according to the first embodiment of FIG. 2;

FIG. 5 is a side view illustrating a second embodiment of the head unit.

FIG. 6 is an explanatory diagram for explaining another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Surface treatment tool 12 Pipe 12a Inner surface of pipe 14 Rotating shaft 15 Main body 16 Processing piece 16a One end 16b Other end 16c Grinding abrasive surface 17 Through hole 18 Coil spring 19 Pin 20 Pipe movement guide 22 Roller 24 Roller mounting part 26 Sarah spring 28 Bearing main body 30 Drive motor 32 Transmission shaft 34 First universal joint 36 Second universal joint 40 Reciprocating guide 42 Mounting table

Claims (9)

[Claims] 1. An inner surface treatment apparatus for a pipe, in which a rotating surface treatment tool is brought into contact with an inner surface of a pipe, and the inner surface of the pipe is rubbed, the rotation axis of the surface treatment tool being adjacent to the surface treatment tool. And abut the inner surface of the pipe at a plurality of locations, and guide the surface treatment tool to move in the longitudinal direction of the pipe while the axis of the rotating shaft is along the center line of the pipe. An inner surface treatment apparatus for a pipe, comprising: an in-pipe movement guide to be driven; and a drive device connected to a rotation axis of the surface treatment tool and configured to rotationally drive the surface treatment tool. 2. The driving device has an output shaft that is driven to rotate. A rotation shaft of the surface treatment tool is connected to the output shaft via a transmission shaft. The output shaft is connected to the transmission shaft, and the rotation shaft is connected to the output shaft. The pipe inner surface treatment device according to claim 1, wherein the transmission shaft is connected to each of the transmission shafts by a universal joint. 3. The apparatus according to claim 1, wherein the driving device moves along a reciprocating guide for reciprocatingly moving the surface treatment tool connected to the driving device along a center line of the pipeline. The inner surface treatment apparatus for a pipe according to claim 1 or 2, wherein: 4. The internal pipe processing apparatus according to claim 3, wherein the driving device is provided so as to be able to change and adjust an angle relative to a pipe as a work. 5. The surface treatment tool comprises: a main body unit integrated with the rotating shaft; and one end portion rotatably mounted on the main body portion, and the other end portion turned outward by centrifugal force. The processing piece formed as a portion pressed against the inner surface of the tube when rubbing the inner surface, and the other end of the processing piece is inwardly pressed against the inner surface of the tube when no centrifugal force is applied. 5. The inner surface treatment apparatus for a pipe according to claim 1, further comprising an urging means for urging the inner surface of the pipe. 6. The processing piece is rotatably mounted on a pin provided on a main body of the surface treatment tool and parallel to the rotation axis, and a through hole of the processing piece into which the pin is inserted. Is
The inner surface treatment apparatus for a pipe according to claim 5, wherein the diameter of the hole at both ends is larger than that at the center so that the treatment piece can be tilted slightly. 7. The in-pipe moving guide is arranged at least at three places in the circumferential direction, and rotates while abutting on the inner surface of the pipe so as to move the surface treatment tool and the in-pipe moving guide in the longitudinal direction of the pipe. Roller group consisting of multiple rollers,
7. The tube according to claim 1, wherein the tube has at least two sets in the longitudinal direction, and is provided adjacent to a rear side which is a side of the driving device. Inner surface treatment device. 8. A roller comprising a plurality of rollers which are arranged in at least three places in the circumferential direction and which rotate so as to move the surface treatment tool and the in-pipe movement guide in the longitudinal direction of the pipe. The inner surface treatment apparatus for a pipe according to any one of claims 1, 2, 3, 4, 5, and 6, wherein the groups are provided so as to be adjacent to each other in front of and behind the surface treatment tool. 9. A roller mounting portion to which the roller is rotatably mounted is provided movably in a predetermined range in a radial direction of the tube and is received by an urging member, and the roller follows irregularities on an inner surface of the tube. 9. The inner surface treatment apparatus for a pipe according to claim 7, wherein the apparatus is provided so as to be movable in a radial direction.